👉 Phlebography is a diagnostic test used to determine the presence of blood clots in the veins or arteries of the human body. It involves using a needle to puncture veins and arteries, then drawing blood into a syringe, which is then tested for the presence of blood clots. Phlebography is often used as part of a comprehensive medical examination, such as an ultrasound, to help diagnose conditions like varicose veins or arterial blockages.